I absolutely LOVED Burberry but then realised that they have SO many made-for-outlet items and most of their main line items go to outlet for half the price most of the time. I still love Burberry, but it changed the way I looked at how much it's 'worth' buying at full price if you can get the same item a few months later heavily reduced at an outlet.
Another one is not aimed at a particular brand, or the fault of a brand themselves, but the trend of buying 'dupes' on Chinese wholesale websites (mostly LV or
Gucci) gets under my skin so much and makes me feel conscious carrying bags that I have seen 'duped' over and over.
I also really don't like when brands become popular with rappers and are mentioned in rap songs

along with obscenities about women, drugs, etc. - for me it devalues a brand (happened a lot with Gucci, LV, now Dior). Reminds me of
this